129301931 has 6 divisors (see below), whose sum is σ = 142125396. Its totient is φ = 117547100.

The previous prime is 129301919. The next prime is 129301943. The reversal of 129301931 is 139103921.

It is an interprime number because it is at equal distance from previous prime (129301919) and next prime (129301943).

It is a de Polignac number, because none of the positive numbers 2^k-129301931 is a prime.

It is a super-2 number, since 2×129301931² = 33437978720657522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129301894 and 129301903.

It is not an unprimeable number, because it can be changed into a prime (129301951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 534185 + ... + 534426.

It is an arithmetic number, because the mean of its divisors is an integer number (23687566).

Almost surely, 2^129301931 is an apocalyptic number.

129301931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129301931 is a deficient number, since it is larger than the sum of its proper divisors (12823465).

129301931 is a wasteful number, since it uses less digits than its factorization.

129301931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068633 (or 1068622 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 129301931 is about 11371.1006943040. The cubic root of 129301931 is about 505.6713366633.

The spelling of 129301931 in words is "one hundred twenty-nine million, three hundred one thousand, nine hundred thirty-one".